Brief introduction of Yushu

Family name: Ulmus) Deciduous trees, up to 25 meters high. The trunk is erect, with many branches, and the crown is nearly spherical or oval. Bark is dark gray, rough and irregular longitudinally. Simple leaves alternate, ovate to elliptic lanceolate, with multiple serrations. The flowers are bisexual, with leaves or leaves blooming together in early spring, purple-brown, and cymes clustered. Samara is almost round with a gap at the top. Flowering in March-April; The fruit ripens in April-May.

Distributed in northeast, north, northwest and southwest provinces. Korea, the former Soviet Union and Mongolia are also distributed. Born on slopes, valleys, valleys, hills and sand dunes below the altitude of1000-2,500m. Cultivated in the lower reaches of the Yangtze River. It is also a common tree species in rural areas of North China and Huaibei Plain.